Biological Changes Over Time

What is not true about fossils?

• Fossils show us that life has a history

• Fossils are evidence of what life was like in the past

• Fossils of organisms look EXACTLY like modern day species, regardless of their age

• The older the fossils are, the less they resemble (look like) modern day species

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

What's a reason we don't have fossils of everything that ever lived on Earth

• Some animals were eaten before they could leave a fossil

• In some areas, the land was disrupted (by floods, earthquakes, etc).

Tags

NGSS.MS-LS4-1

Fossils show that...

• The traits of animals have changed over time

• Once animals are adapted to eating something they never change their diet

• The traits of animals can be understood in relation to their environment

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Finding fossils of coral reefs in the Nevada desert provides evidence that

• Nevada used to be much colder than it is today

• An ocean once covered what is now Nevada

• Ancient corals used to live on land

• There was a mistake because no coral reefs exist in deserts

Tags

NGSS.MS-LS4-1

NGSS.MS-ESS2-2

Where are the oldest fossils found in rock layers?

• The bottom layer

• In the middle

• The top layer

• All the layers are the same age

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NGSS.MS-ESS1-4

If two organisms have similar bone structures, that means...

• they are very different from each other

• they are closely related

Tags

NGSS.MS-LS4-2

The theory of common ancestry states that all modern organisms...

• can change in response to environmental change

• have a single ancestral species

• have not changed over time

• can be arranged in a linear order from "least evolved" to "most evolved"

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

If the embryos of different species look similar, this shows...

• no evolutionary relationships between the groups

• recent common ancestry

• evolution from a distant common ancestor

• similar environments in the past

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NGSS.MS-LS4-2

NGSS.MS-LS4-3

Natural selection is "survival of the fittest." This means that if a population of organisms does not adapt to its environment, it will eventually __________.

• become the dominant species

• increase gene pool

• become extinct

• none of the above

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NGSS.MS-LS4-4

Some bugs like to eat plants, even though they can be toxic. Natural selection favors bugs that... (or the the bugs that will survive the best are the ones that...)

• only eat the toxic plants

• eat a variety of different plants

• eat many different leaves of the same toxic plant

Tags

NGSS.MS-LS4-4